The O-DEF was produced by the <a href="/getinvolved/workgroups/semantic">Semantic Interoperability Work Group</a> of the <a href="/getinvolved/forums/platform3.0">Open Platform 3.0<sup>&trade;</sup> Forum.

Get involved in collaborative development of the O-DEF and of tools to support it! Visit the O-DEF <a href="https://collaboration.opengroup.org/o-def">collaboration page</a>.

The O-DEF consists of an index and a method for using it to classify data elements. <a href="http://o-def.info">View the initial index!</a>

The O-DEF standard defines the structure of the index and describes the method and how to use it. <a href="http://www.opengroup.org/bookstore/catalog/c163.htm">Download</a> the standard from The Open Group publications catalog!